The midpoint of CD is M=(5. –1). One endpoint is C=(7.1). Find the coordinates of the other endpoint, D.

D = (3, -3)

Step-by-step explanation:

A key fact needed to solve this is that the distance of C to M is equal to the distance of D to M, as M is the midpoint of CD. Now considering the x and y distance of C to M separately, C is 2 to the right (7 - 5) and 2 up from (1 - -1) M. This means that, conversely, D has to be 2 to the left and 2 down from M. Doing the maths, we see that (5 - 2, -1 - 2) = (3, -3).

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

i wish i could you, i have no idea how to answer this

step-by-step explanation: